Version: 0.1
Date: 2013-08-26
Category: First version
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Version: 0.1.1
Category: Fixed bug in snap read that meant it didn't work on snapshots
        with particles in multiple species lists
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Version: 0.1.2
Date: 2013-10-22
Category: Fixed issue that code wouldn't work with mass array being
        specified per particle. Now it will assign masses to particles
        based on the header mass information
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Version: 2.0
Category: Lots of changes merging in Federico's format-2 functions. Not
        thoroughly checked yet (so not on CRAN) but the package is
        fully legal and documented. Now format-1 is suffixed ".1"" and
        format-2 is suffixed ".2
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